Supernet calculator

What is supernet?

Networks or subnets combined into single nework with common CIDR mask is called supernets or supernetworks.
The common routing prefix of supernet is aggregated from the prefixes
of given networks or subnets and it must be smaller or the same as
smallest component network prefix. This concept of creating a supernet
is called supernetting or routing aggregation. Route aggregation reduces
the number of advertised routes on huge networks by summarizing routes.

Supernetting was introduced to solve the problem with rapidly growing
routing tables and because of IP version 4 address pool exhaustion. The
main benefits of route aggregation (supernetting) are less memory and
CPU power requirments for storing and processing routes. More
information about supernets can be found in RFC 1338 - Supernetting: an
address assignment and aggregation strategy.